106 National Geographic Magazine. 
feet of rocks of various hardnesses, here concerned. The smaller 
streams of the Uinta range are therefore certainly not of necessity 
antecedent to the Uinta uplift: the probability is that they were 
originally purely consequent, and that at present they are nicely 
adjusted to the structures that they have discovered. 
I have learned so much from the doctrine of baselevelling, as 
presented in Major Powell’s writings, that I shall hope to profit 
by the lesson of the Uinta drainage as well: that is, the possibil- 
ity that an apparently sound conclusion may be overturned when 
new processes that bear upon it are discovered. It is here said 
that the drainage of the Watchung crescent in New Jersey is an 
example of partial adjustment following a superimposed origin : 
hence the necessity of watching closely for the discovery of new 
principles in the history of river work that may call for a revision 
of this conclusion. 
There are two other examples of peculiar accidents in the his- 
tory of rivers in New Jersey, to which I wish to call attention ; 
both of them in the latest cycle of the development of the State, 
that is, in the cycle which has changed the central region from its 
even baselevelled lowland surface, to the pastplain as we now see 
it. Like the uplift of the Schooley (Highland) peneplain, the 
uplift of the Central plain, in passing from the second to the third 
cycle, was not uniform throughout, but was greater in one place 
than in another. In the neighborhood of the lower Raritan 
river, a distinct though gentle slope to the northwest is apparent 
in the unconsumed surface of the pastplain; but this strong 
river runs southeastward against the slope; it is an anaclinal 
stream. The tilting of the pastplain is moderate, and its rocks 
are weak ; the river is large and strong. Its anaclinal course is 
therefore best explained by regarding it as a mild example of an 
antecedent stream. But Ambrose’s brook, a small stream to one 
side of the Raritan, flows northwest with the gentle slope that 
was given to the pastplain. Ambrose’s brook therefore most 
likely is not a survivor from the previous cycle, but is a new 
stream consequent on the slight deformation by which the latest 
cycle here considered was ushered in. Manalapan and Assanpink 
are apparently of the same kind. (See fig. 1). 
The Millstone river appears to be intermediate as respects 
origin between the Raritan and Ambrose’s brook. It appears 
still to lie for the most part in the channel that it occupied before 
the elevation and tilting of the baselevelled Central plain, but the 
